add the MainNet's params,modify the ProcessBlock

Signed-off-by: spark.huang <240401736@qq.com>
change the private key

Signed-off-by: ranger.shi <ranger.shi@gmail.com>
add a command and add a rpccommand......
add if(!wtxNew.IsTransactionValid())return false; in createNewTx
modify the height > 4380
fixed invalid lotto transaction bug.